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<h3 id="&#x89D2;&#x8272;&#x548C;&#x5B9E;&#x73B0;">&#x89D2;&#x8272;&#x548C;&#x5B9E;&#x73B0;</h3>
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<pre><code class="lang-java"><span class="hljs-keyword">package</span> command;
<span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">CommandPattern</span>
</span>{
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span><span class="hljs-params">(String[] args)</span>
    </span>{
        Command cmd=<span class="hljs-keyword">new</span> ConcreteCommand();
        Invoker ir=<span class="hljs-keyword">new</span> Invoker(cmd);
        System.out.println(<span class="hljs-string">&quot;&#x5BA2;&#x6237;&#x8BBF;&#x95EE;&#x8C03;&#x7528;&#x8005;&#x7684;call()&#x65B9;&#x6CD5;...&quot;</span>);
        ir.call();
    }
}
<span class="hljs-comment">//&#x8C03;&#x7528;&#x8005;</span>
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Invoker</span>
</span>{
    <span class="hljs-keyword">private</span> Command command;
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">Invoker</span><span class="hljs-params">(Command command)</span>
    </span>{
        <span class="hljs-keyword">this</span>.command=command;
    }
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setCommand</span><span class="hljs-params">(Command command)</span>
    </span>{
        <span class="hljs-keyword">this</span>.command=command;
    }
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">call</span><span class="hljs-params">()</span>
    </span>{
        System.out.println(<span class="hljs-string">&quot;&#x8C03;&#x7528;&#x8005;&#x6267;&#x884C;&#x547D;&#x4EE4;command...&quot;</span>);
        command.execute();
    }
}
<span class="hljs-comment">//&#x62BD;&#x8C61;&#x547D;&#x4EE4;</span>
<span class="hljs-class"><span class="hljs-keyword">interface</span> <span class="hljs-title">Command</span>
</span>{
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">abstract</span> <span class="hljs-keyword">void</span> <span class="hljs-title">execute</span><span class="hljs-params">()</span></span>;
}
<span class="hljs-comment">//&#x5177;&#x4F53;&#x547D;&#x4EE4;</span>
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">ConcreteCommand</span> <span class="hljs-keyword">implements</span> <span class="hljs-title">Command</span>
</span>{
    <span class="hljs-keyword">private</span> Receiver receiver;
    ConcreteCommand()
    {
        receiver=<span class="hljs-keyword">new</span> Receiver();
    }
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">execute</span><span class="hljs-params">()</span>
    </span>{
        receiver.action();
    }
}
<span class="hljs-comment">//&#x63A5;&#x6536;&#x8005;</span>
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Receiver</span>
</span>{
    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">action</span><span class="hljs-params">()</span>
    </span>{
        System.out.println(<span class="hljs-string">&quot;&#x63A5;&#x6536;&#x8005;&#x7684;action()&#x65B9;&#x6CD5;&#x88AB;&#x8C03;&#x7528;...&quot;</span>);
    }
}
</code></pre>
<h3 id="&#x6A21;&#x62DF;&#x573A;&#x666F;">&#x6A21;&#x62DF;&#x573A;&#x666F;</h3>
<p>&#x6BD4;&#x5982;&#x8BF4;&#x70B9;&#x5916;&#x5356;</p>
<p>&#x6211;&#x8981;&#x70B9;&#x5916;&#x5356;&#xFF0C;&#x5916;&#x5356;app&#x4E0A;&#x7684;&#x5403;&#x7684;&#x548C;&#x5E97;&#x94FA;&#x6709;&#x5F88;&#x591A;&#x5F88;&#x591A;&#xFF0C;&#x9009;&#x4E86;&#x597D;&#x4E45;&#x4E4B;&#x540E;&#xFF0C;&#x6211;&#x5728;app&#x4E0A;&#x4E0B;&#x5355;&#x70B9;&#x4E86;&#x4E00;&#x5BB6;&#x540D;&#x53EB;&#x9EC4;&#x7116;&#x9E21;&#x7C73;&#x996D;&#x5E97;&#x5185;&#x7684;&#x9EC4;&#x7116;&#x9E21;</p>
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